impressions on ghc-6.4
Serge D. Mechveliani
mechvel at botik.ru
Thu Jun 9 06:47:28 EDT 2005
On Thu, Jun 09, 2005 at 10:29:25AM +0100, Simon Marlow wrote:
> 5.02 is parsed as 5.2 by the Version parser:
>
> > readP_to_S parseVersion "5.02"
> [(Version {versionBranch = [5], versionTags = []},".02"),(Version
> {versionBranch = [5,2], versionTags = []},"")]
>
> so I'm not sure what you're referring to here. Could you give a
> concrete example?
Ah, I see: "sequence of natural numbers separated by dots".
So, the community needs to consider "ghc-5.02" and "ghc-5.2" as
equivalent. As to me, I would not complain. I do not know, people
may do.
On memory expense
-----------------
> A difference of 2.5Mb is really very small. If you could show that the
> space usage is linear in one case and flat in another, then we have a
> problem.
But a ratio 2600 K / 200 K for n = 55000 is not so small.
I never tested this, but what if in this mergeSort-like example the
space sizes are
space.6.4(n) = 13*space.5.02(n)
(which has the above ratio for n = 55000)
?
-----------------
Serge Mechveliani
mechvel at botik.ru
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